Most karts of this type are found around America. The east coast is a strong spot for the Speedway Kart. You'll find them on pavement or concrete ovals(left turn only). There are road course tracks (left and right turns) that race these as well, but they are more well known for the ovals.
An Oval Kart on Pavement
They are on an offset chassis (the frame of the kart is built so it is easier to turn left) if they are racing on oval tracks. They don't have to have a body, but most of them now have bodies that wrap around to the rear tires and front "noses".
The engines can vary but a very popular engine is the 4 cycle engine made by Briggs and Stratton. The two engines they build for this type of kart are the Briggs Animal and Briggs Raptor. The animal is the newer of the two and is the more standard one now. But there are still plenty of racers using the Raptor.
This is the type of kart I primarily raced throughout my career in Kart Racing. I raced asphalt ovals, asphalt road courses and dirt ovals.